HD64F3437TF16 Datasheet, PDF (141/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

Port 2 Data Register (P2DR)
Bit
7
P2₇
Initial value
0
Read/Write R/W
6
P2₆
0
R/W
5
P2₅
0
R/W
4
P2₄
0
R/W
3
P2₃
0
R/W
2
P2₂
0
R/W
1
P2₁
0
R/W
0
P2₀
0
R/W
P2DR is an 8-bit register that stores data for pins P2₇ to P2₀. When a P2DDR bit is set to 1, if port
2 is read, the value in P2DR is obtained directly, regardless of the actual pin state. When a P2DDR
bit is cleared to 0, if port 2 is read the pin state is obtained.
P2DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its existing values.
Port 2 Input Pull-Up Control Register (P2PCR)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
P2₇PCR P2₆PCR P2₅PCR P2₄PCR P2₃PCR P2₂PCR P2₁PCR P1₀PCR
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P2PCR is an 8-bit readable/writable register that controls the input pull-up transistors in port 2. If
a P2DDR bit is cleared to 0 (designating input) and the corresponding P2PCR bit is set to 1, the
input pull-up transistor is turned on.
P2PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its existing values.
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